|Publication number||US6912985 B2|
|Application number||US 10/652,683|
|Publication date||Jul 5, 2005|
|Filing date||Aug 29, 2003|
|Priority date||Dec 18, 2002|
|Also published as||US20040118373|
|Publication number||10652683, 652683, US 6912985 B2, US 6912985B2, US-B2-6912985, US6912985 B2, US6912985B2|
|Inventors||Fred Gesell, Michael Blank|
|Original Assignee||Micron Technology, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (8), Classifications (6), Legal Events (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This application claims the benefit of U.S. Provisional Application No. 60/434,509, filed on Dec. 18, 2002, hereby incorporated herein in its entirety by reference.
The present invention relates generally to internal combustion engines and in particular the present invention relates to directing the flow of oil in an internal combustion engine.
One type of internal combustion engine is an overhead camshaft diesel engine that is commonly used in diesel-electric locomotives and in marine and power generation applications. This engine can be produced in a “V” configuration, where two banks of cylinder assemblies form the “V”, or as a straight block where the cylinder assemblies are in a straight line.
Each bank of cylinder assemblies has an upper deck assembly that covers the cylinders. The upper deck assembly is typically comprised of metal that is formed to fit around the cylinders in addition to a cover that is connected to the top of the metal sides. The upper deck assembly is bolted to the engine block with a gasket between the upper deck sides and the engine block. The gasket prevents oil from within the engine from leaking out during normal operation.
Each bank of cylinder assemblies has at least one overhead camshaft comprised of cam lobes that engage followers on rocker arms as the layshaft rotates. This action can be used to actuate valve mechanisms and other mechanical devices.
To ensure proper operation of the layshafts, each camshaft is supplied with lubricating oil, as is each bearing through which the camshaft rotates. A portion of the lubricating oil comes from oil sprayed by various moving parts of the engine including the rocker arms and followers.
The gasket between the engine block and upper deck assembly cannot always keep oil from leaking out of the engine due to uneven clamping of the upper deck assembly to the engine block. Additionally, imperfections in the surface of the upper deck frame that forms one side of the gasket joint can allow oil out of the engine. This can result in damage to the engine from the oil on the exterior of the engine. There is a resulting need in the art to prevent oil from leaking out from between the upper deck assembly and the engine block.
The embodiments of the present invention encompass an oil deflector apparatus. In one embodiment, the apparatus is used in an internal combustion engine having an engine block, an upper deck assembly, and a gasket between the engine block and the upper deck assembly. At least one surface of the gasket is internal to the engine.
A first portion of the apparatus extends lengthwise over the gasket. The first portion is capable of being coupled to the engine block. A second portion is coupled to and extends lengthwise along the first portion. The second portion is coupled to the first portion at an angle such that the surface of the gasket that is internal to the engine is substantially covered.
The upper deck oil deflector apparatus of the embodiments of the present invention deflects oil away from the gasket that is between the upper deck assembly and the engine block. The deflector substantially reduces the amount of oil that can leak out from between the upper deck assembly and the engine block.
Alternate embodiments are not limited to any predetermined quantity of sections or length of sections. For example, one embodiment may be only one section for the entire deflector apparatus. Additional embodiments may incorporate more or fewer than three sections.
The deflector apparatus, in one embodiment, is comprised of an injection molded polyurethane material. Alternate embodiments may use different materials and different manufacturing methods.
The deflector apparatus has a horizontally molded portion (110) that incorporates mounting holes through which mounting bolts or other types of fasteners can be inserted. These mounting holes are discussed subsequently in greater detail with reference to
A vertically molded portion (112) incorporates camshaft support extensions (130-137) that wrap around the camshaft bearing supports in the engine block. These extensions improve the oil deflection characteristics of the apparatus by keeping the oil sprayed from the camshaft bearing area from the gasket.
Since the deflector apparatus is injection molded, the horizontal (110) and vertical portions (112) are constructed as one unit. The layshaft support extensions (130-137) that are distributed lengthwise along the apparatus are also injection molded as one unit with the rest of the apparatus. However, alternate embodiments that use different manufacturing methods may construct each section (101--103) of the apparatus from separate portions (110 and 112). Additionally, the terms vertical and horizontal are used only for purposes of clarity in describing the apparatus. The two portions of the oil deflector apparatus of the embodiments of the present invention are not necessarily horizontal and vertical nor are they required to be orientated 90° to each other as illustrated in the embodiment of FIG. 1. The orientation of the lengthwise portions that comprise the deflector apparatus is determined by the engine configuration to which the apparatus is mounted. In alternate embodiments, the two lengthwise portions may be angled in a range between 0° and 180°.
In one embodiment, the two end sections (101 and 103) of the oil deflector apparatus have a short “L” portion incorporated at the outside end (150 and 151) of each section (101 and 103). This “L” portion extends up the side of each end of the upper deck assembly. Alternate embodiments may not incorporate this feature.
The embodiment illustrated in
As described subsequently with reference to
In the embodiment of
The mounting hole in the bottom section (102) that is joined to the upper section (101) is substantially the same size as the mounting hole in the upper section (101). A cross sectional view of this mounting detail is illustrated in FIG. 3 and described subsequently.
The embodiment of
As discussed previously, the different sections (101 and 102) of the deflector apparatus are not symmetrical. Therefore, each section must be joined to the appropriate end of another section. The assembly can be made more foolproof by the addition of symbols (230 and 231) on each end to be joined with another. In the embodiment of
In one embodiment, the mounting hole in the upper section (301) is substantially the same size as the mounting hole in the lower section (302). This provides a mounting hole through which the one-piece flanged spacer (210) can be inserted prior to inserting the mounting bolt (205).
The remaining section oil deflection apparatus has similar mounting holes for connecting the remaining section to complete the apparatus and mount it to the engine. Alternate embodiments may use different size mounting holes in each section, depending on the mounting hardware used.
The bolt (205) is inserted into threaded mounting holes in the engine block in order to hold the oil deflector apparatus in place over the gasket. This mounting configuration is described subsequently.
As is well known in the art, the layshaft support (410) contains a bearing through which the layshaft (415) rotates. Oil from this bearing can be splashed on the gasket. The layshaft support extension (400) prevents this oil from reaching the gasket as well as allowing the oil deflector apparatus to fit the length of the engine block around these supports.
In one embodiment, the oil deflector apparatus (520 and 521) of the present invention is mounted over the gaskets (512 and 513) on the outer sides of the engine block (530). These are the gaskets that receive the most oil contact from the internal splashing of oil. Alternate embodiments mount the oil deflector apparatus (520 and 521) over all of the gaskets between each upper deck (510 and 511) and the engine block (530).
As discussed above, due to the asymmetrical character of some engines, the oil deflector apparatus (520) that is mounted on one side of the engine block (530) will not fit on the other side of the engine block (530). This is due to the mounting holes and layshaft support hardware being in different locations on each side. In such an embodiment, the first oil deflector apparatus (520) is a mirror image of the second oil deflector apparatus (521). In alternate embodiments where the engine mounting holes and layshaft supports are symmetrically laid out, the same oil deflector apparatus can be used on either side of the engine. The area (500) of one of the oil deflector apparatuses (520) is illustrated in greater detail in FIG. 6.
A sealing lip (605) extends lengthwise along the sections of the apparatus (520) and projects upward to contact the upper deck assembly (510). The sealing lip provides extra protection against oil getting between the upper deck assembly (510) and the oil deflection apparatus (520).
The embodiment of
The embodiments described above mount the apparatus in the upper deck assembly of an internal combustion engine. However, the oil deflector apparatus of the present invention is not limited to only the upper deck assembly. Alternate embodiments could mount the oil deflector in any location in the engine in which it is desired to reduce oil contact.
In summary, the oil deflector apparatus of the present invention reduces oil leakage by deflecting oil away from the gasket. This reduces expensive maintenance required due to the oil leakage. The apparatus can be installed without any modifications to the existing engine other than mounting the apparatus over the gasket internal to the upper deck assembly.
Although specific embodiments have been illustrated and described herein, it will be appreciated by those of ordinary skill in the art that any arrangement that is calculated to achieve the same purpose may be substituted for the specific embodiments shown. Many adaptations of the invention will be apparent to those of ordinary skill in the art. Accordingly, this application is intended to cover any adaptations or variations of the invention. It is manifestly intended that this invention be limited only by the following claims and equivalents thereof.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US4345552||Dec 18, 1979||Aug 24, 1982||Cummins Engine Company, Inc.||Rocker housing and rocker cover|
|US4463956||Jul 21, 1983||Aug 7, 1984||General Motors Corporation||Shield for labyrinth seal|
|US4471731||Feb 18, 1982||Sep 18, 1984||Cummins Engine Company, Inc.||Rocker housing and rocker cover|
|US4584975||May 15, 1985||Apr 29, 1986||Yamaha Hatsudoki Kabushiki Kaisha||Oil drain arrangement for internal combustion engine|
|US5492086||Sep 15, 1994||Feb 20, 1996||Durox Company, Inc.||Valve cover|
|US5937817 *||Jun 23, 1998||Aug 17, 1999||Harley-Davidson Motor Company||Dry sump oil cooling system|
|US6293245||Jan 12, 2000||Sep 25, 2001||Caterpillar Inc.||Sealing-fail safe leakage control in a cylinder head joint|
|US6584950 *||May 29, 2002||Jul 1, 2003||Bayer Corporation||Oil pan|
|U.S. Classification||123/195.00A, 123/196.00R, 264/328.1|
|Aug 29, 2003||AS||Assignment|
Owner name: MILLER FELPAX CORPORATION, IDAHO
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GESELL, WILLIAM F.;BLANK, MICHAEL;REEL/FRAME:014471/0216
Effective date: 20030821
|Jul 5, 2005||AS||Assignment|
Owner name: MILLER FELPAX CORP., MINNESOTA
Free format text: CORRECTION OF ASSIGNEE ADDRESS;ASSIGNORS:GESELL, WILLIAM F.;BLANK, MICHAEL;REEL/FRAME:016735/0729;SIGNING DATES FROM 20030804 TO 20030821
|Aug 21, 2007||CC||Certificate of correction|
|Jan 13, 2009||REMI||Maintenance fee reminder mailed|
|Jul 5, 2009||LAPS||Lapse for failure to pay maintenance fees|
|Aug 25, 2009||FP||Expired due to failure to pay maintenance fee|
Effective date: 20090705